In Celtic mythology, the legendary figure known for her role as a warrior and queen of the Tuatha Dé Danann is Ériu (or Eire). Ériu symbolizes the essence of Ireland itself, embodying strength and femininity. As a goddess of sovereignty, she appears in legends associated with the land, fertility, and protection of her people. Her stories often intertwine with themes of battle, enchantment, and the deep ties between the land and its inhabitants.